*{
    padding:0;
    margin:0;
    box-sizing:border-box;
}
ul{
    width:1270px;
    margin:50px auto;
    overflow:hidden;
}
li{
    width:141px;
    height:30px;
    list-style: none;
    float: left;
}
a{
    text-decoration:none;
    color: #333;
}